package com.bit.java;

import javax.xml.namespace.QName;

public class People {
    String name;
    int age;

    public  void study() {
        System.out.println(this.name + " 学习 8 小时");
    }

}

class Student1 extends People {

    Student1 student1 = new Student1();
    public static void main(String[] args) {

    }
}
